<template>
  <div class="app-container">
    讲师表单
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name" />
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number
          v-model="teacher.sort"
          controls-position="right"
          min="0"
        />
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师" />
          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" />
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea" />
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar" />
        <!-- 文件上传按钮 -->
        <el-button
          type="primary"
          icon="el-icon-upload"
          @click="imagecropperShow = true"
          >更换头像
        </el-button>

        <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 
        <input type="file" name="file"/>
      -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/eduoss/fileoss'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"
        />
      </el-form-item>
      <el-form-item>
        <el-button
          :disabled="saveBtnDisabled"
          type="primary"
          @click="saveOrUpdate"
          >保存</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import teacherApi from "@/api/edu/teacher";
import imageCropper from "@/components/ImageCropper/index"
import panThumb from "@/components/PanThumb/index"
export default {
  components:{imageCropper,panThumb},
  data() {
    return {
      teacher: {
        name: "",
        sort: 0,
        level: 1,
        career: "",
        intro: "",
        avatar: ""
      },
      imagecropperShow: false,
      imagecropperKey: 0,
      BASE_API: process.env.VUE_APP_BASE_API,
      saveBtnDisabled: false // 保存按钮是否禁用,
    };
  },
  created() {
    //页面渲染之前执行
    this.init();
  },
  watch: {
    //监听
    $route(to, from) {
      //路由变化方式，路由发生变化，方法就会执行
      this.init();
    }
  },
  methods: {
  
    init() {
      //判断路径有id值,做修改
      if (this.$route.params && this.$route.params.id) {
        //从路径获取id值
        const id = this.$route.params.id;
        //调用根据id查询的方法
        this.getInfo(id);
      } else {
        //路径没有id值，做添加
        //清空表单
        this.teacher = {};
      }
    },
    //头像关闭
    close(){
      this.imagecropperShow=false
      this.imagecropperKey=this.imagecropperKey+1
    },
    //上传成功回调
    cropSuccess(data){
      this.teacher.avatar=data.url
    },
    //根据讲师id查询的方法
    getInfo(id) {
      teacherApi.getTeacherInfo(id).then(response => {
        this.teacher = response.data.teacher;
      });
    },
    saveOrUpdate() {
      //判断修改还是添加
      //根据teacher是否有id
      if (!this.teacher.id) {
        //添加
        this.saveTeacher();
      } else {
        //修改
        this.updateTeacher();
      }
    },
    //修改讲师的方法
    updateTeacher() {
      teacherApi.updateTeacherInfo(this.teacher).then(response => {
        //提示信息
        this.$message({
          type: "success",
          message: "修改成功!"
        });
        //回到列表页面 路由跳转
        this.$router.push({ path: "/edu/teacher/list" });
      });
    },
    //添加讲师的方法
    saveTeacher() {
      teacherApi.addTeacher(this.teacher).then(response => {
        //添加成功
        //提示信息
        this.$message({
          type: "success",
          message: "添加成功!"
        });
        //回到列表页面 路由跳转
        this.$router.push({ path: "/edu/teacher/list" });
      });
    }
  }
};
</script>
